The Caddo Nation's a confederacy of several Southeastern Native American tribes, who, in the 16th century, inhabited much of what's now East Texas, western Louisiana and portions of southern Arkansas and Oklahoma. Today the Caddo Nation's a cohesive tribe with its capital at Binger, Oklahoma, and the Caddoan dialects have converged into a single language. The current Chairperson of the Caddo's LaRue Parker. This article covers the Caddo as a tribe, or nation. For other Caddoan languages see: Ca… (More on Caddo)